It's a pretty well-known fact that if you really want to save money at the grocery store, you need to use coupons. The most serious couponers can save an unbelievable 90 percent on their grocery bills. But extreme couponing can almost become a full-time job. You have to be dedicated, organized and single-minded if you really want to get the most out of couponing.

But not all of us have the stamina for that. We might clip a coupon here and there, but we're not buying extra Sunday papers, stacking coupons, hanging out on couponing Web sites and spending our weekends with scissors in hand. But we still want to save money -- who doesn't? Fear not.

If you're really serious about saving money, you need to take advantage of coupons. But there are plenty of common-sense ways to be frugal that don't involve the time and effort of coupons. For starters, it's always a good idea to avoid prepackaged products and buy as many whole, unprocessed foods as possible. If you educate yourself just a little bit about sale cycles, product placement, store layouts and unit prices, you're guaranteed to see a difference in your grocery bills. It might not be 90 percent, but it's a start. Here are 10 ways that coupon-shunners can save big at the grocery store.